/* 垂直水平居中 */
.flex-c {
	display: flex;
	align-items: center;
	justify-content: center;
}

.flex-ac {
	display: flex;
	align-items: center;
	justify-content: space-around;
}

.flex-bc {
	display: flex;
	align-items: center;
	justify-content: space-between;
}
